Dry-dock.



PATENTED AUG. 4," 1 903.

T. NELS SEN.

' DRY DOOK.

APPLICATION FILED APR. 11, 1903.

felssen.

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Qmilrweawo UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

DRY-DOCK.

SPECIFICATION forming part of Letters Patent N 0. 735,569, dated August 4, i903.

Application filed April 1], lQOS. Serial No. 152,239. (No model.)

To all whom it may concern:

Be it known that I, TERKEL NELssEN, a citizen of the United States, residing at Hoboken, in the county of Hudson and State of New 5 Jersey, have invented new and useful Improvements in Dry-Docks, of which the following is a specification.

My invention relates to new and useful improvements in dry-docks, and more especially 0 to mechanism for centering vessels within the same.

The object of the invention is to provide simple and inexpensive mechanism which can be readily applied to docks of ordinary construction and by means of which a vessel may be drawn to the center of the dock prior to the withdrawal of water from the dock.

Another object of the invention is to so construct the mechanism employed as to enable itto be used in connection with vesselsof different sizes. 7

With the above and other objects in View the invention consists in providing a drum adapted to be rotated by suitable mechanism to which are secured'cables extending to opposite sides of the dock and having means at the free ends thereof for engaging the opposite sides of the vessels to be supported. Said cables are of such length as to permit the hooks thereof to be brought together only at a point directly above the center of the clock. It is therefore obvious that when the drum is rotated the hooks will be moved in opposite directions at the same speed and will engage the opposite sides of the vessel and move the vessel to the center of the dock.

' The invention also consists in the further novel construction and combination of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawing, which is a section through a dock having a vessel secured in position therein and showing in dotted lines the positions of the parts when larger or smaller vessels are supported thereby.

Referring tothe drawing by numerals of reference, 1 is the outer sheathing of the dock, upon which are mounted suitable supportingbeams 2 for holding the floor 3 of the dock in proper relation thereto. Brace-beams 4 are arranged in different positions between the floor and the bottom sheathing of the dock and are also located upon the side of the dock for the purpose of holding the inner side walls 5 thereof in position.

An ordinary form of fioatin g dock has been illustrated by me, and it is unnecessary to employ a particular construction when my invention is used. In docks of this character a pump is usually employed for continuously removing the water therefrom, and in the drawing I have shown the shaft 1 of said pump provided with a friction-pulley 2,which is arranged directly above the friction-pulley 3, having a drum 4 thereon. A friction-pulley 5 is interposedbetween pulleys 2 and 3 and is mounted in sliding bearings, and this pulley is adapted to be moved into or out of operative relation with pulleys 3 by means of a lever 6 or in any other suitable manner. The ends of cables 7 and S are secured to the drum 4 and are adapted to be simultaneously wound thereon when the said drum is rotated. One of these cables 7 extends through one side of the dock and is provided at its free end with a suitable hook 9 or any other suitable means whereby it may be rigidly fastened to one side of the vessel. The other cable 8 extends downwardly between the walls and bottoms of the dock and is mounted on suitably-located pulleys 10, swiveled to beams 11, arranged adjacent to the lower ends of the side walls 5, and said cable extends from the upper end of the side of the dock opposite to that upon which drum 4; is located and is provided at its free end with a hook 12 or any other suitable securing means. These cables are of such length that the hooks when drawn toward each other will meet at the center of the dock, and therefore it is obvious that when the cables are wound upon the drum the hooks thereof will -be moved from each vessel is to be held in position, the cables can be brought downward under hooks 13 or other suitable holding means, as illustrated in dotted lines in the drawing, and where beats of unusually large proportions are within the dock it is necessary to extend the cables over hooks 14: or other securing means extending from masts 15, suitably connected to the sides of the dock and extending upward therefrom. Suitable bilge-blocks may be arranged upon the fioor of the dock, as ordinarily, for supporting the vessel in proper position after the withdrawal of the water from the dock.

In the foregoing description I have shown the preferred form of my invention; but I do not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing any of the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

Having thus described the invention, what is claimed as new isl. The combination with a dock having a power-shaft thereon; of a drum adapted to be rotated by said shaft, cables connected to and adapted to be simultaneously wound upon the drum, said cables extending to opposite sides of the dock, and means for securing the cables to a vessel in the dock.

2. The combination with a dock having a power-shaft thereon; of a drum, means for transmitting motion from said shaft to the drum, cables connected to and adapted to be wound upon the drum simultaneously, said cables extending to opposite sides of the dock,

and means upon the free ends of the cable for engaging the opposite sides of a vessel within the dock.

The combination with a dock having a power-shaft thereon; of a drum, a movable pulley interposed between said shaft and drum, whereby rotary motion may be imparted to the drum from the shaft, cables secured to and adapted to be wound upon the drum simultaneously, one of said cables extending longitudinally between the walls and bottoms of the dock to the opposite sides thereof, means upon the free ends of the cables for engaging the opposite sides of a vessel within the dock, and masts upon the dock for supporting the cables thereabove.

l. The combination with a dock; of cables extending from opposite sides of the dock and adapted to be secured to a vessel in the dock, and means for simultaneously moving the ends of the cables in opposite directions.

5. The combination with a dock; of cables extending from opposite sides thereof and adapted to be secured to opposite sides of a vessel in the dock, and means for simultaneously operating the cables for centering the vessel in the dock.

In testimony whereof I afiix my signature in presence of two witnesses.

TERKEL NELSSEN.

Witnesses:

\VALDo OLSEN, GUSTAV NELSSON. 

